Fits 4-71 thru 18-71 roots and screw superchargers. Outside diameter of blower pulley spacer is 3.325".
Spacer is new and unused, RBS took them in on trade allowing the next buyer a chance to save some money and get a like new part at a discounted price. RBS has two of these so buy one or buy both and save! Spacers are sold each.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.